U

U command, 22

UCS (User Coordinate Systems), 10

grid rotation, 56, 57

ordinate dimensions, 307

point coordinates, 329

solids rotation, 160–163, 161–162

working with, 164–165, 164

UCS icon, 10

UCS toolbar, 18

UCS II toolbar, 18

Underline tool, 266

Undo command, 22

Undo tool, 22, 38

with Modify menu, 127

for text, 266

undoing actions and Undo option, 22

Extend, 134

Pedit, 148

text edits, 266

Ungroup option, 245

union operation, 165–166, 165

Union tool, 165, 165

Unit Format option, 320–321

units

for blocks, 256

for dimensions, 320–323, 320–321

selecting, 44–47, 45

setting, 19

Units Format option, 321

Unlock Object's Layer tool, 222

Unnamed option, 244

Unstack tool, 266

updating xref files, 249, 249

Upper Value option, 323

Uppercase tool, 266

Upside Down option, 277

Use Background Mask option, 269

Use Color Dependent Plot Styles option, 362

Use Drawing Background Color option, 269

Use Overall Scale Of option, 314, 318

User Coordinate Systems. See UCS (User Coordinate Systems)

User Defined option, 86

user-defined paper sizes, 353